Idle Problems 3K In Ke11

[camerondownunder88]

Hi,

Need some mind power by some gurus on here to help me with my idle issue...

 

The other day was driving my KE11 and when crusing down a road at any speed if I jumped off the noise pedal car would pop a bit (so lean out pops ok all cool). Pops started to get more frequent when off the throttel so I figured car running a tad lean. Then BOOM car stopped ideling. But when driving with throttel open 100% fine.

 

So I did the whole undo idel screw blow some compressed air in to clear idle jets spray in some carby cleaner put screw back in. Toyota specs say start at 3 turns off shut. Due to a semi mild cam (kicks in around 3500RPM) my idel screw is 3 and 3/4 off seat. Idel speed I run 750/800 RPM. With dizzy set at 10 degrees at idel with no vac lines attached.

 

So after blowing out jets car ran like a DREAM :)

 

So now comes today crusing on high way in 4th gear at 100km/h. Did a slight wrong and over took a car in right lane and accelerated and though ah pop foot to floor full song and then pull back in so I did acceled up to 120 ish over took jumped in left lane again jumped off throttel to coast back to 100. BAM

 

Jump off throttel and car rolled on then started missing......didnt wanna hold speed struggeled to do 80km/h.

 

So tapped throttel a few times and car then seemed to run. Did 100km/h for rest of trip home (30km).

 

Get home car WONT idel stalls out.

 

Ok did air compressor trick with idle jet popped it back in 3 and a 3/4 turns off seat start car BAM runs FINE.

 

So go inside for the arvo. Now I had to go out this evening.

 

start car tad of choke due to large cam hates a fresh cold start. Reverse out gate. about 3 streets away choke off BAM car wont idle.

 

Now also if I have throttle a few dregrees open so idel jet isnt in play and were running off main primary jet then car runs FINE no shudder hesitation on accel nothing.

 

Back off throttel vacuume comes in and car shudders wants to stop running hesitates etc.

 

Seems to only happen with high vac pressures and when idel jet is in play.

 

So I pulled over and though step two. Remove vac line to dizzy advance and block.

 

No better still wont idle. So pulled over again (oh side note car at full operating temp so not cold not hot jsut nice) out comes torch peak in dizzy thinking little copper braid in dizzy as it advances might be coming apart and then dizzy shorts. NOPE electronic 5K dizzy no lead all electric. So shut bonnet drive home just can idel at lights.

 

Now if car stalls at lights I have to have accelerator at least 50% open can feel secondary linkage touch and will start or give two FULL pumps of pedal.

 

So kinda stumped. Thinking tomorrow ill be ripping top OFF carby see if more gunk is in slow jet primary or secondary jet etc.

 

But short list of engine specs:

Apparently rebuilt 3K

mild cam 3500RPM start

stock air box NEW airfilter 1 week old

Stock KE11 carby no polution gear no PCV etc

stock early straight runner manifold

slightly ported head

extractors

5K electronic dizzy

GT40 non resistor coil

KE70 starter motor

KE70 4 speed manual.

NEW fuel filter a meatl Ryco type off fuel injected car filters much finer than paper rubbish

 

 

So ANY ideas would help.

 

Issue seems to start when I went from FULL throttel to jammed shut and on coast down generating a large vacuume.

 

Also noted storms in QLD last night car was in rain though ah water in fuel tank half full so filled also tonight with E10 to help suck up any water and a cup full of metho. Normaly I chose 91 unleaded.

 

Any ideas/help apprecated.

 

Sorry for shit house spelling.

 

 

Cheers

Cameron

[altezzaclub]

Yeah, pull the top off the carby and see what is lurking in there. The fact that it ran great once you'd blown it out suggests a carb problem, rather that than a burnt valve, but perhaps more dirt is getting pulled into the jets.

 

Other than that, I don't know... Is the timing jamming at full advance? Even with the electronic dizzy you are still using the advance weights under the dizzy baseplate. Make sure the dizzy cam turns back and forth easily, just grab the rotor and see if it swings each way..